Added: #1469 Implementation of the GoTo step

--HG--
branch : gsoc2012-fabien

code/ryzom/client/src/camera_animation_manager/camera_animation_step_player_factory.cpp

@@ -123,7 +123,7 @@ void ICameraAnimationStepPlayer::stopStepAndModifiers()
 	}
 }
 
-NLMISC::CVector ICameraAnimationStepPlayer::computeCurrentLookAtDir(float ratio, const NLMISC::CVector& currPos, const NLMISC::CVector& startLookAtDir,
+NLMISC::CVector ICameraAnimationStepPlayer::computeCurrentLookAtDir(float ratio, const NLMISC::CVector& startLookAtDir,
 																	const NLMISC::CVector& endLookAtDir)
 {
 	// We normalize the start look at direction

code/ryzom/client/src/camera_animation_manager/camera_animation_step_player_factory.h

@@ -59,10 +59,10 @@ public:
 
 protected:
 
-	/// Compute the current look at direction depending on the current position, the starting look at direction,
+	/// Compute the current look at direction depending on the starting look at direction,
 	/// the ending look at direction and the progression expressed as a ratio (value between 0 and 1 that expresses the
 	/// progression)
-	NLMISC::CVector computeCurrentLookAtDir(float ratio, const NLMISC::CVector& currPos, const NLMISC::CVector& startLookAtDir,
+	NLMISC::CVector computeCurrentLookAtDir(float ratio, const NLMISC::CVector& startLookAtDir,
 										const NLMISC::CVector& endLookAtDir);
 
 	// The list of modifiers

code/ryzom/client/src/camera_animation_manager/camera_animation_steps_players.cpp

@@ -83,10 +83,10 @@ public:
 		float ratio = currCamInfo.ElapsedTimeSinceStartStep / getDuration();
 
 		// We compute the final look at direction
-		NLMISC::CVector finalDir = resolvePositionOrEntityPosition(LookAtPos) - currCamInfo.CamPos;
+		NLMISC::CVector finalDir = resolvePositionOrEntityPosition(LookAtPos) - camInfo.CamPos;
 
 		// We get the current look at direction
-		camInfo.CamLookAtDir = computeCurrentLookAtDir(ratio, camInfo.CamPos, currCamInfo.CamLookAtDir, finalDir);
+		camInfo.CamLookAtDir = computeCurrentLookAtDir(ratio, currCamInfo.CamLookAtDir, finalDir);
 
 		return camInfo;
 	}
@@ -123,7 +123,24 @@ public:
 	/// Function that plays the step
 	virtual TCameraAnimationInfo updateStep(const TCameraAnimationInfo& currCamInfo)
 	{
-		return currCamInfo;
+		TCameraAnimationInfo camInfo;
+
+		float ratio = currCamInfo.ElapsedTimeSinceStartStep / getDuration();
+
+		// We compute the current position between the starting position and the final position
+		NLMISC::CVector movementVector = resolvePositionOrEntityPosition(EndPos) - currCamInfo.CamPos;
+
+		// We current position is computed using the ratio and the starting position
+		NLMISC::CVector offset = movementVector * ratio;
+		camInfo.CamPos = currCamInfo.CamPos + offset;
+
+		// Now we compute the current look at direction
+		NLMISC::CVector finalDir = resolvePositionOrEntityPosition(LookAtPos) - camInfo.CamPos;
+
+		// We get the current look at direction
+		camInfo.CamLookAtDir = computeCurrentLookAtDir(ratio, currCamInfo.CamLookAtDir, finalDir);
+
+		return camInfo;
 	}
 
 	virtual void stopStep()